fishtail swordfern Care (Nephrolepis falcata)

This fern prefers bright, filtered light that mimics dappled forest shade.

• Provide 4–6 hours of bright, indirect light each day; morning sun through an east window or light under shade cloth outdoors works well for fishtail swordfern.
• Tolerates partial shade, but very low light leads to sparse, pale fronds and slow growth; move closer to a bright window or lightly brighter outdoor spot if this occurs.
• Avoid strong midday or afternoon sun, which can scorch frond tips; in summer, shift slightly farther from windows or give more overhead shade.

This species prefers evenly moist, never soggy, soil.

• Water when the top 2–3 cm of soil feels barely dry; fronds should not wilt between waterings, which signals underwatering.
• Use a free-draining, organic-rich mix so excess water runs out quickly; yellowing, mushy bases indicate overwatering, while crisp, browning tips suggest the root zone is staying too dry.
• Reduce frequency in cooler months when growth slows, but do not let the root ball dry out completely, especially in heated indoor air or windy outdoor conditions.

Stable, warm conditions support dense, healthy fronds.

• Aim for 65–80°F (18–27°C) for active growth; plants maintain best foliage density and color in this range.
• Short dips to 55°F (13°C) are usually tolerated, but prolonged exposure below 50°F (10°C) can cause frond damage and eventual dieback.
• Protect from frost and extreme heat; avoid locations above 90°F (32°C) without shade and airflow, and shield from cold drafts near doors, uninsulated windows, or outdoor cold snaps.

This fern prefers consistently moist air and reacts quickly to very dry conditions.

• Aim for 50–70% humidity to prevent frond tips from drying and browning.
• Tolerates short dry spells, but prolonged air below 40% leads to crispy edges and sparse new fronds in fishtail swordfern.
• Increase humidity with a nearby humidifier, grouped plants, or a pebble tray, rather than misting alone.

Nephrolepis falcata prefers a loose, organic-rich, evenly moist but well-drained substrate.

• Use a peat- or coco coir-based mix with plenty of fine bark and compost for a fibrous, loamy texture.
• Improve drainage and aeration by adding 20–30% perlite or pumice so water drains within seconds, not minutes.
• Keep soil slightly acidic, around pH 5.5–6.5, which supports nutrient availability and healthy root function.
• Avoid heavy garden soil, dense clay, or mixes that stay waterlogged, which promote root and rhizome rot.

This species grows well in containers, including hanging baskets, when stability and drainage are managed carefully.

• Choose a wide, shallow pot to accommodate its spreading root system and prevent the plant from becoming top-heavy at the rim.
• Select breathable materials such as unglazed terracotta if moisture retention tends to be high in your environment.
• Ensure the container has multiple drainage holes so excess water exits quickly and does not pool around the rhizomes.

This fern benefits from light, consistent nutrition during active growth but reacts poorly to strong feeds.

• Use a balanced liquid fertilizer (such as 10-10-10 or 20-20-20) at 1/4–1/2 strength every 4–6 weeks in spring and summer.
• Alternatively, apply a thin layer of fine compost on the soil surface for gentle, slow nutrient release.
• Skip or halve feeding in fall and winter when growth slows, especially for fishtail swordfern grown indoors.
• Flush the pot with plain water every few months to reduce salt buildup from soluble fertilizers.

Careful pruning keeps Nephrolepis falcata neat and encourages fresh frond production.

• Best time is late winter to early spring, before strong new growth begins.
• Remove dead, yellowing, or mechanically damaged fronds at the base using clean, sharp scissors or pruners.
• Thin out crowded or inward-growing fronds to improve air flow and maintain an even, arching shape.
• Disinfect tools before and after use, especially if any fronds show signs of rot or disease.

This fern prefers slightly tight quarters but needs repotting when root-bound or declining.

• Check for signs such as roots circling the pot, pushing through drainage holes, or slower frond growth despite good care.
• Plan to repot every 2–3 years in spring, using a slightly larger container with airy, peat-free, well-draining mix.
• Water the plant a day before repotting, then gently loosen and untangle outer roots to reduce transplant shock.
• After repotting, keep the plant in bright, indirect light, maintain even moisture, and avoid fertilizing for 3–4 weeks.

This fern is most often propagated by division rather than spores for reliable results.

• Divide mature clumps of Nephrolepis falcata in spring when removing from the pot for repotting or refreshing soil.
• Use a clean knife or hand-tear natural divisions, ensuring each section has healthy roots and several viable fronds.
• Plant divisions into small pots with moist, well-draining mix, and firm gently to remove large air pockets.
• Maintain high humidity, steady warmth (65–75°F), and shaded, indirect light until strong new growth appears.

This tropical fern is frost-sensitive and needs mild, stable conditions in winter.

• In regions below 50°F, grow Nephrolepis falcata in containers so plants can be moved indoors before first frost.
• Indoors, place in bright, indirect light and keep temperatures around 60–75°F, away from cold drafts or heating vents.
• Keep soil slightly moist but not waterlogged in winter, and increase humidity with trays of water or a room humidifier.